That's Aqua Regia.  One metal that is not etched by this combination is
Chrome.

David Nemeth
Senior Process Engineer
Sophia Wireless, Inc.
14225-C Sullyfield Circle
Chantilly, VA
Ph: (703) 961-9573 x206
Fax:(703) 961-9576

-----Original Message-----
From: [email protected] [mailto:[email protected]]On
Behalf Of Rivas, Isabel
Sent: Thursday, January 24, 2002 11:26 AM
To: '[email protected]'
Subject: [mems-talk] metal resistant to HCl:HNO3


Hello,

Could anyone tell me a metal which resists this etchant: HCl:HNO3 (8:1)?

Thank you very much

         Isabel.
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